Gregory Bender


Slide needle specifications for Dellorto PHVB motorcycle carburetors (M slides): Series 15377 X 08 M

Detailed technical information regarding Dell’Orto motorcycle carburetors, how to tune, parts diagrams, slide specifications, needle specifications, jet specifications, and atomizer specifications.

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This information was gleaned from Eurocarb. When I originally created this page on , I meticulously recreated the table of values from a very difficult to read original image. Mistakes were definitely present as the original image was of poor quality. Here is a link to the original image in case you would like to scrutinize any particulars.

On I noted that Eurocarb had greatly improved the quality of these specifications. I've updated the specification with accurate information as provided by Eurocarb.

PHVB carburetor slide needle.
PHVB carburetor slide needle.

Photo courtesy of Eurocarb.

Table: Slide needle series 15377 X 08 M

Type Value X Characteristic expressed in millimeters
ØA ØB C D ØF G
M1 01 2 1.1 19.5 19.9
M2 02 2.02 1.1 26 13.4 1.97 20
M3 03 2.02 1.1 20.5 18.9
M4 04 2.02 1.1 21.5 17.9
M5 05 2 0.6 19.5 19.9
M6 06 2.02 1.1 22.5 16.9
M7 07 2.02 0.6 23 16.4 1.97 21
M8 08 2 24 15.4 20